Cita APA (7a ed.)

National Association of Probation Officers (Gran Bretaña). (1955). Probation. National Association of Probation Officers.

Cita Chicago Style (17a ed.)

National Association of Probation Officers (Gran Bretaña). Probation. London: National Association of Probation Officers, 1955.

Cita MLA (9a ed.)

National Association of Probation Officers (Gran Bretaña). Probation. National Association of Probation Officers, 1955.